Boat plans for a 12′ to 28′ pontoon boat made from plywood for the amateur boatbuilder.. Mini tugboat plans and houseboat plans by berkeley eastman. these boats are guaranteed to bring smiles of joy to those around you! also offering hehr rv windows. Using one of these boat plans, you will be able to build the boat you have dreamed of for years. these boat plans come in many variations and there are powerboats.